Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon showing my new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The rectangular broken-line perimeter illustrates a display screen or portion thereof and forms no part of the claimed design. The remaining broken lines illustrate portions of an icon and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 